When you turn on or reset an IBM-compatible PC, the BIOS first performs a
number of tasks, called the Power-On-Self-Test (POST ). These tasks test
and initialize the hardware and then boot the Operating System from the hard
disk.
At the beginning of each POST task, the BIOS outputs the test-point error
code to I/O port 80h. Programmers and technicians use this code during
trouble shooting to establish at what point the system...

This document lists checkpoints and beep codes generated by AMIBIOS. This document was last revised at the release of AMIBIOS8 Core 8.00.04. This covers AMIBIOS products released before May 2002. The checkpoints defined in this document are inherent to the AMIBIOS generic core, and do not include any chipset or board specific checkpoint definitions.1.2 Checkpoints and Beep Codes

INTRODUCTION
The Desktop / Notebook Diagnostic Card is a powerful diagnostic tool for technicians and
administrators to troubleshoot various problems of notebook PC PII/III/ P4 by using a PCI and
LPT (printer port) Bus. It is easy to install, yet extremely powerful to use. With this card in hand,
you no longer have to go through tedious and time consuming process of trying to figure out what
is wrong with your hardware. Notebook Diagnostic Card will indicate...

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Hi help pls :( need all 2 bios for HP EliteBook 745 G4 TRAVOLTA-6050A2834601 MB A01 i found one but him not start :( full day i solder end back :))) 20 time i think :))) On board 2 chip one 8mb and 16 mb